Pipe finishing tool



Jan. 5, 1932. T, R sLElGHT 1,839,708

PIPE FINISHING TOOL Filed Dec. 29 1930 3 Sheets-Sheet l I nvcnlor Zmzwiifliez'yizzi A llomey T. R, SLEIGHT 1,839,708

Jan. 5, 1932.

PIPE FINISHING TOOL File ec- 9 1950 3 Sheets-Sheet 2 I n venlor By @Mw/ih A llomey Jan. 5, 1932. SLEIGHT 1,839,708

I PIPE FINISHING TOOL Filed Dec. 29 1930 s Sheets-Sheet s- 3 Invenlor ZMw/i;

A llomey Patented Jan. 5, 1932 THOMAS a. SLEIGHT, or 'sYLVA NIAQoEIO p Application filed December 29,1980; Seria1No.- 5O5,406.

This invention relates to a finishing tool or implement for use in association with concrete pipes such as are used for drainage,

sewer construction and the like, and it has reference to a structure which is designed for finishing a butt end, a bell end, or a tongue and groove end formation.

More specifically stated, the invention is designed for use in a concrete pipe mold employed in the process of making mechanically rammed semi-dry concrete pipes of the aforementioned classification.

The usual apparatus or machine employed for this purpose embodies a revolving table on the floor elevation of the plant with a core fastened to an overhead hoisting device in such a way that it can be raised and lowered with respect to the form but will not turn. In many instances, a bell is used and this ordinarily hangs on the top of the core and is operable as a unit with the coreand does iot turn. in such a Waythat it turns with the table.

Under the ordinary arrangement, when a pipe is to be cast, or made, the form is placed on the table, the core is lowered inside of the form until it rests on the table, the bell is moved to one side and the mechanical ram is placed between the core and the form. The table is started to revolve and the ram is started. Semi-dry concrete is allowed to run slowly between the core and the form. The core is stationary and the form is turning at this time. The ram pounds the semi-dry concrete firmly into place, the concrete turning with the form.

When the concrete is built up to within a few inches of the top of the form, the bell is slipped into place and the concrete is rammed up to the top of the form. Then the top of the bell is finished OK. The usual method employed for finishing is a small hand-manipulated trowel.

The inventive conception constituting the novelty of this application comprehends a finishing tool designed to take the place of the ordinary hand trowel, and in carrying the invention into efiect, I have evolved and produced a simple and economical tool which is The form is secured on the table associated with ayolre -iastened on the-socalled annular bellr :Theparticular' structural details'and rela tit e-arrangement and association will become more readily apparent-hem the -fol- -255 lowi-ng'description and drawings. In. the drawings: V

Figure 1 is 521 fragmentary top-plan view showing the general assembly with the tool in operating position. d v Figure 2is a central vertical-sectional-view through the structure. Fi-gure 3 is an enlarged side elevational view showingthc details and arrangement of the tool.

' Fignre d is a section taken approximately onthe plane ofthe line 4-4 of Figure 1. Figure 5 isatop plan-view of the finished bell-end pipe.

Figure 6tisda sectional viewshowingthe 7o butt-end formation. a

. Figure :7 isan inside 'elevational viewof a fragmentary portion ofthe annulus or bell.

Figure 8 is a cross sectional View. through oneen'd portion of the tool. I

mAttent-ion isfirst invited to Figure 2, wherein it w-ill beobservedthat the former mold is generallydesignated bythereference characterQ. This comprisesa shell or body portion 10 having a suitably shaped -1langed rin1 11 at itstop. The reciprocatory' core'is denoted the numeral 12 and this; fits :into the-form to provide an annular space therebetween toaccommodate the semi-dry con Crete pipe 13.

The annular hell is designated bythe numeral This-is of-channel-shaped cross section and-shaped either as shown in Figure 2:01 *Figuree according to the particular shapeof channel desired at the belleen dof 9 the;pipe. The improvedtool isdesi-gneditor finishing theedge 15 ofthe bellrend ofgthe pipe.

- In the preferred embodiment, I; provide :a yoke orbracket ltwhic-h isboltedor otherwisesecured to the'top flange of the annular ten 14. The numeral 117 designates the .arcuate shoe having upturned ends 118 and1 9 respectively. At the end 19 is a laterally iF i' ly IitedhandleQO.

nected to an intermediate portion of the shoe, a lever secured intermediate its ends to said bracket, said lever being provided at its one end with a fulcrum hook and a handle fas tened to one end of the shoe.

In testimony whereof I affix my signature.

THOMAS R. SLEIGHT.

He takes the handles 20 in his right hand.

By producing the pressure on the central portion of the shoe through the medium of the hinge bracketand lever 24:, the handle 20 is in a position to enable the operator to keep the shoe level with the handle 20.

When the concrete has turned around under the shoe a few revolutions with a pressure on the handle 24, the concrete becomes smooth and level and the bell is finished. The bell finisher or tool is then removed from the pipe and carried away and transported in the usual way. This process, it is understood, is not adapted to wet concrete, which is hand poured, but only to semi-dry concrete. 4 V

1 It is thought that persons skilled in the art to which the invention relates will be able to obtain a clear understanding of the invention after considering the description in connection with the drawings. Therefore, a more lengthy description is regarded as unnecessary.

Minor changes in shape, size, and rearrangement of details coming within the field of invention claimed may be resorted to in actual practice if desired.

I claim:

1. In a structure of the class described, a bell-end finishing tool of the class described comprising an annular bell, an arcuate flat plate-like shoe, a yoke mounted rigidly on said bell, a hinge leaf fastened rigidly to the intermediate portion of the shoe, a right angular hinge bracket carried by the leaf, a lever fastened to the bracket, said lever having a fulcrum hook at its inner end detachably engageable with said yoke bracket, and a rigid handle secured to one end portion of the shoe.

2. As a new product of manufacture, a finishing tool for a concrete pipe comprising a segmental fiat plate-like shoe having its opposite ends upturned,-a hinge leaf fastened rigidly to the intermediate portion of said plate, a right-angular bracket hingedly mounted on said leaf, a lever secured intermediate its ends to said bracket, said lever being provided at its inner end with a fulcrum hook, and a rigid handle fastened to one end portion of said shoe.

3. A tool of the class described comprisng a segmental fiat plate-like shoe having lts ends upturned, a bracket hingedly con 

